Add exo2 preliminary structure

Signed-off-by: Jérôme Benoit <jerome.benoit@piment-noir.org>

diff --git a/exo2/Makefile b/exo2/Makefile
new file mode 100644 (file)
index 0000000..184cdd5
--- /dev/null
+++ b/exo2/Makefile
@@ -0,0 +1,31 @@
+TARGET = exo2
+LIBS =
+CC = gcc
+# Enforce C11 ISO standard for now
+CFLAGS = -std=c11 -g -Wall
+LDFLAGS = -g -Wall
+
+.PHONY: default all clean
+
+default: $(TARGET)
+all: default
+
+OBJECTS = $(patsubst %.c, %.o, $(wildcard *.c))
+HEADERS = $(wildcard *.h)
+
+%.o: %.c $(HEADERS)
+       $(CC) $(CFLAGS) -c $< -o $@
+
+.PRECIOUS: $(TARGET) $(OBJECTS)
+
+$(TARGET): $(OBJECTS)
+       $(CC) $(OBJECTS) $(LDFLAGS) $(LIBS) -o $@
+
+clean:
+       -rm -f $(TARGET) $(OBJECTS) 
+
+disassemble: $(TARGET)
+       objdump -d $< | less
+
+symbols: $(TARGET)
+       objdump -t $< | sort | less

diff --git a/exo2/exo2.c b/exo2/exo2.c
new file mode 100644 (file)
index 0000000..8bb939d
--- /dev/null
+++ b/exo2/exo2.c
@@ -0,0 +1,70 @@
+#include <stdio.h>
+//#include <stdbool.h>
+
+//FIXME: Comment the code !!!
+
+void displayMenuEntry(int num, const char* option) {
+    printf("%d - %s\n", num, option);
+}
+
+void displayMenu() {
+    displayMenuEntry(1, "Addition");
+    displayMenuEntry(2, "Soustraction");
+    displayMenuEntry(3, "Multiplication");
+    displayMenuEntry(4, "Division");
+    displayMenuEntry(5, "Puissance");
+    displayMenuEntry(6, "Quitter");
+}
+
+int promptValue(const char* invite) {
+    int value = 0;
+    puts(invite);    
+    scanf("%d", &value);
+    return value;
+}
+
+int promptOperation() {
+    displayMenu();
+    return promptValue("Veuillez saisir un choix ?");
+}
+
+int doAddition(int val1, int val2) {
+    return val1 + val2;
+}
+
+int doSubstraction(int val1, int val2) {
+    return val1 - val2; 
+}
+
+int doMultiplication(int val1, int val2) {
+    return val1 * val2;
+}
+
+int doDivision(int val1, int val2) {
+    if (val2 == 0) {
+        printf("Division par zero !\n");
+        // FIXME: I'm not very fond of this convention ...
+        return 0;
+    } else {
+        return val1 / val2;
+    }
+}
+
+int doPuissance(int base, int expo) {
+    int power;
+    if ( expo == 1) {
+        power = base;               
+    } else if ( expo % 2 == 0 ) {
+        power = doPuissance(base*base, expo/2);    
+    } else {
+        power = base*doPuissance(base*base,(expo-1)/2);
+    }
+    return power;
+}
+
+int main() {
+    int choice = promptOperation();
+    printf("Choice: %d\n", choice);
+
+    return 0;
+}